Investigation of Energy Dissipation for Different Breakwater Based on Computational Fluid Dynamic Model

Q2 Mathematics CFD Letters Pub Date : 2023-11-29 DOI:10.37934/cfdl.16.1.2242
Uday Abdul, Sahib M. Alturfi, Abdul-Hassan K. Shukur
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Abstract

In this research, the hydraulic performance of the combined shape breakwaters was investigated through a laboratory study supported by a numerical mathematical model CFD to examine the different model shapes depending on the transmissions wave coefficient Ct. In order to stabilize the incident wave Hi with the same characteristics, waves were defined through the UDF file for CFD model. To investigated the performance of breakwaters base on energy dissipations, different models were tested under various wave condition, water depth, and relative submerged depth. Result of this study are showed that the Transmission coefficient are increased with increased of incident wave high for all type of breakwater model, and for all models of breakwater, transmission wave height (Ht) are increased with increased relative submerged depth (Hs/Hi). The highest value for energy dissipations (1 - Ct) % are received for zero submerged depth in model of sloped steps model (M2) is 80 %. Ansys Fluent solver are adopted to modelling the transit flow condition with dynamic mesh to represent the flap motion type to generate wave. Numerical beach plays an important role in CFD model to prevent the reflection wave in lee side of breakwater and represent the absorbing shoreline. 240 grid per wave length are selected for Mesh independent solution and make acceptable result comparison with experimental.
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基于计算流体动力学模型的不同防波堤能量耗散研究
在本研究中,通过实验室研究和 CFD 数值数学模型对组合形状防波堤的水力性能进行了研究,以考察不同模型形状对透射波系数 Ct 的影响。为了研究防波堤的耗能性能,在不同的波浪条件、水深和相对浸没深度下测试了不同的模型。研究结果表明,对于所有类型的防波堤模型,透波系数都随着入射波高的增加而增加;对于所有防波堤模型,透波高度(Ht)都随着相对水深(Hs/Hi)的增加而增加。在倾斜阶梯模型(M2)中,零浸没深度时的能量耗散(1 - Ct)的最高值为 80%。采用 Ansys Fluent 求解器对过境流条件进行建模,并使用动态网格来表示产生波浪的襟翼运动类型。数值海滩在 CFD 模型中起着重要作用,可防止防波堤左侧的反射波,并代表吸收海岸线。每个波长选择 240 个网格进行网格独立求解,并与实验结果进行比较。
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来源期刊
CFD Letters
CFD Letters Chemical Engineering-Fluid Flow and Transfer Processes
CiteScore
3.40
自引率
0.00%
发文量
76
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